Yes, vehicles have become more fuel efficient, but a just-released report by the Institute on Taxation and Economic Policy shows that inflation is 3.5 times more responsible for the decline in the purchasing power of the gas tax.
Jun 25, 2015 Institute on Taxation and Economic Policy
NPR reports on the incipient movement among a dozen states considering raising gas taxes. It centers on New Jersey which arguably illustrates best the need to raise gas taxes to maintain roads and bridges, but it won't be easy, as the interviews show
Feb 13, 2015 NPR
While there may never be a good time to increase the federal gas tax, the same is not true when it comes to state gas taxes—perhaps because governors can't transfer billions of dollars from general funds to pay for roads. Lower gas prices helps.
Dec 12, 2014 NPR
At $100 million, it is the largest of the five bonds on the Nov. 5 ballot. While six other transportation bonds were voted on (and approved) since 2000, the need for this bond comes from a 2011 law that eliminated the indexing of the state gas tax.
Nov 1, 2013 Portland Press Herald
It may seem counter-intuitive to charge extra fees for the cleanest, most fuel-efficient vehicles on the road today - including those that qualify for a federal $7,500 credit. But ten states are doing just that to keep roads well-funded.
Jun 19, 2013 The New American